Gas-Solid Equilibrium

My 6th Edition of "Perry's Chemical Engineers' Handbook" has a 3-page section on "sublimation" which might at least get you started. That section also includes a few references (books and journal articles).

This Wikipedia online article may also be helpful:

http://en.wikipedia.org/wiki/Sublimation (chemistry)

Does any other gas than CO2 form a solid? I can't readily think right now of any that do.

Many solids sublime. Two common examples: naphthalene ("moth balls") and menthol. These are organic compounds, but sublimation also occurs for many inorganic compounds. Any solid that has a noticeable odor must sublime to some degree.

The examples quoted do not inclued true gaseous substances. Is the an actual gas that will form a solid other than CO2. Sublimation is not really the same thing. Does O2 or Nitrogen or hellium form a solid. They can all form liquids but I have never seen or heard of them being in a solid phase.

Brainwave:

Where did you find the distinction between "true" or "actual" gases and "untrue" or unactual" gases? Any substance in the vapor phase is a gas ... be it substances that sublime like carbon dioxide, caffeine, naphthalene, meta-phosphoric acid, formamide, arsenious oxide, chromic chloride, cobaltic chloride, nickel chloride ... or be it gases that do not sublime like steam (water vapor), propane, butane, mercaptans, nitrogen oxides, hydrogen sulfide, ammonia, and thousands of other gases.

The examples quoted do not inclued true gaseous substances.

Yes, they *do* form gases. If individual molecules floating through the air do not qualify as gases, then what would you call them? (the other three possibilities -- solid, liquid, or plasma -- don't apply)

Does O2 or Nitrogen or hellium form a solid. They can all form liquids but I have never seen or heard of them being in a solid phase.

O2 and N2 do form solids, at 54.36 K (-218.79 °C, -361.82 °F) and 63.15 K (-210.00 °C, -346.00 °F), respectively. Helium does not form a solid at ordinary pressure (1 atm), even at a temperature of absolute zero (0 K, -273.15°C, –459.67°F). Solidification of helium requires a combiniation of extremely low temperature and extremely high pressure. Wikipedia serves as a great source of information -- you should try it.

http://en.wikipedia.org/wiki/Oxygen

http://en.wikipedia.org/wiki/Nitrogen

http://en.wikipedia.org/wiki/Helium

Sublimation is the exact oposite of forming a solid from a gas!!!!!!!!!!!!!!

Iodine, but on a different temperature scale. Solid on ambiance, straight to gas with very little heat. It will sometimes sublimate in ambient temperature, given low pressure

Nevermind that.

I don't think I truly understand the OP question.

In what sense Solid / Gas equilibrium?

You can read Robert Treybal´s Mass Transfer Operations....Explains about gas solid equlibrium in an absortion context